brooke



(Model'.) 4 Sheets-Sheet 1.

R. GqBRooKBQ INJBcToR.

No. 580,762. 'Patented Apr. 1s, 1897.

(Model.) 4 Sheets-Sheet 2.

, R. G. BROOKE.

l INJBGTOR.

No. 580,762. Patented Apr. 13, 1897.

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Lla I7 La `E5 I4 L5 UNITED STATES` PATENT OFFICE.

ROBERT GRUNDY BROOKE, OF MAOOLESFIELD, ENGLAND.

INJ ECTO R.

SPECIFICATION forming part of Letters Patent No. 580,762, dated April 13, 1897.

Application led July 15, 1896. Serial No. 599,273. (Model.)

To all whom it may concern:

Be it known that I, ROBERT GEUNDY BROOKE, a subject of the Queen of Great Britain and Ireland, residing at Macclesfield, in the county of Chester, England, have invented Improvements in Injectors, of which the following is a specification.

This invention has reference to improvements in exhaust-'steam injectors, and has for its object to increase the efficiency of such injectors, as I shall now proceed to describe with reference to the accompanying drawings, in which- Figure 1 is a vertical section, and Fig. 2 a horizontal section on the line oc x of Fig. 1, showing one construction of exhaust-steam injector according to this invention. Figs. 3, 4, and are part vertical sections showing modified constructions of such injectors.

Inan exhaust-steam injector according to this invention the exhaust-steam 'nozzle 1 is moved endwise for the purpose of regulating the cross-sectional area for water b etween its inner end 1a and the interior of a fixed combining-nozzle 2 by being screwed into the injector-casing 3, as at 3a, and being turned in one direction or the other by means either of a worm 4, that gears with a worm-wheel 5,

` fast on the exterior of the nozzle 1, as shown in Figs. 1 and 2, or by means of a pinion 4a, that gears with a spur-wheel 5, fast on the said nozzle, as shown in Fig. 3, the worm or pinion being fixed upon a regulating-spindle 6, extending to the exterior of the casing 3 through a stuffing-box or tubular guide 7,`

iixedv either in the side, Figs. 1 and 2, or end, Fig. 3, of the casing, according as a worm or pinion is used, the arrangement being such that by rotating the worm or pinion the steamnozzle 1 will be moved endwise in one direction or the other, according to the direction of rotation. The worm or pinion is formed with a conical portion or valve 4b, which by being pressed against the coned inner end of the guide 7 prevents escape of steam at this point.

6b is a hand regulating-wheel fixed on the spindle.

The injector may be so constructed that when provided with a central solid spindle 8, Figs. 1 and 2,' or hollow steam-spindle 9, Fig.

3, or spindles 9 9, Fig. 4, passing through the exhaust-steam nozzle 1, the latter and also the exhaust-steam-supply chamber 10 will have a clear way therethrough unobstructed by cross-bars or other means of attachment for the spindle or spindles, thereby enabling the steam to act more eiioiently than in exhaust-steam injectors as heretofore usually constructed. For this purpose the movable exhaust-steam nozzle 1 may, as shown in Fig. 3, be made with an open end 1b., that is, Without the usual cross-bars, perforated walls, or other obstructions, and is in free communication with the exhaust-steam-supply chamber 10, which is in communication with a lateral exhaust-steam-supply passage 10% The nozzle 1 is inserted through a hole that is formed in the end of the injector-casing at 11 and is normally closed by an end cap or cover 12, to which the centrally-arranged spindle or spindles is or are fixed. Iu some cases, however, it is found desirable to continue the steam-nozzle 1 through the steam-space 10, as shown in Fig. 1, so as to obtain a guide or bearing in the cap 12 for the upper end of the nozzle in addition to the lower bearing 3, so that any tendency of the nozzle to cant and seize, by reason of the action of the worm 4 on the worm-wheel 8, when the direction of rot-ation is reversed will be obviated. In this arrangement the nozzle 1 may be screwed into its lower bearing 3, as shown at 3a, or in its upper bearing, and the nozzle is formed with lateral inlet-openings 1c for passage of steam to its interior from the steam-chamber 10. Any possible canting or seizing action of the nozzle 1 can also be obviated by suitably lengthening the lower bearing 3.

When a live-steam jet is to be employed, as would be the case when the injector is required to Work against a higher pressure than it would with exhauststeam alone, the spindle is made hollow, as shown at 9 in Fig. 3, and live steam is supplied to it by a pipe 13, connected by a union 13ad with the central projecting portion 12 of the 'end cap or cover, which has a hole 12b through its center in connection with the hollow spindle.

In the modified construction shown in Fig. 4 the live-steam spindle carried by the perforated cap or cover 12 instead of being single,

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as in Fig. 3, is made double, but is specially arranged so that of the two concentricallyarrangedhollow spindles 9 9au the outer one- Viz., flu-which is made shorter than the inner one 9, is made to converge onto or toward the inner one, so that the area of the steam-exit between the two is smallest at, or practically at, the end of the outer spindle, as shown. By this construction the action of the injector is greatly improved and the jet of mixed water and steam leaving the injector is able to be forced against a higher pressure than heretofore. The outer spindle 9a may be screwed or fitted onto the inner spindle 9 at 9b, the latter being provided with a collar 9C,

A against which the end of the outer spindle makes a steam-tight joint. On the other side ofthis collar the inner spindle is prolonged,

' as shown at 9d, and screwed so as to fasten into the steam-passage 12b, extending through the cap l2. The inner spindle 9 is formed with perforations 9e, so that steam supplied to it can pass partly to the outer spindle 9a and two concentric jets of live steam be thereby produced. A double spindle constructed as described can be advantageously used in ordinary injectors.

Fig. 5 shows a further modied construction of the injector suitable for use when it is desired at times to work the injector by live steam admitted through the exhauststeam nozzle l instead of with exhaust-steam, as, for example, when the engine from which the exhaust-steam is obtained is standing. In this case the cap or cover 12 on the end of the injector-casing 3 is in the form of a valve adapted to control the supply of live steam to the exhaust-steam chamber 10 of the injector where it expands, the ordinary wingvalve' 14 being preferably left partly open for the purpose, and acts in the saine way as the exhaust-steam supplied to the said chamber in the ordinary way. The valve-body 14E carries a hollow live-steam spindle, which vmay be single, as shown at 9 in full lines, or double, as shown at 9 9LL in full and dotted lines, which extends centrally through the exhauststeam nozzle 1, and to which live steam is supplied at high pressure from the chamber 15 at the supply side of the main valve 16 through a passage 17, controlled by a supplementary valve 18, the spindle 19 of which may extend outward in a direction at right angles to that of the main valve, as shown, or in any other suitable direction.

What I claim is- 1. In an injector, a rotary exhaust-steam nozzle screwed into the injector, gearing located within said casing and adapted to rotate said nozzle, and a regulating-spindle extending to the exterior of said casing and adapted to operate said gearing, substantially as described for the purpose specified.

2. An injector having an exhaust-steamsupply chamber with lateral inlet-passage, an endWise-movable exhaust-steam nozzle having an unobstructed inlet end in free commu- ,A ing` an unobstructed inlet end in free communication with said steam-supply chamber, and a hollow live-steam spindle carried by the end of the injector-casing and extending centrally through said steam-supply chamber and nozzle, substantially as described.

. 4. In an injector, a compound live-steam spindle composed of two concentric hollow spindles the outer of which is made shorter than and so as to converge toward the inner one, the area of the steam-exit from the outer spindle being smallest at the free end of said outer spindle, substantially as described.

5. In an injector, an endwise-adjustable exhaust-steam nozzle, a compound live-steam spindle carried independently of said nozzle and composed of two hollow spindles that are in communication with each other yand the outer of which is made shorter than and to converge toward the inner one the area of the steam-exit from said outer spindle being smallest at the free 'end of said spindle, substantially as described.

6. In an injector, an exhaust-steam-supply chamber with lateral inlet-passage, an endwise-adjustable exhaust-steam nozzle in' free communication with said steam-supply chamber, a cap or cover closing a hole in the end of the in j ector-casing through which said nozzle can be inserted, and a iixed spindle carried by said cap or cover and extending through but independent of `said nozzle, substantially as described.

'7. In an injector, an exhaust-steam-supply chamber with lateral inlet-passage, an endwise-movable exhaust-steam nozzle 1 in communication with said steam-supply chamber, a cap or cover closinga holein the end of the injector-casing through which said nozzle can be inserted, and a hollow live-steam spindle carried by said cap or cover, having its interior in communication with a live-steam passage through said cap or cover, and extending into but independent of said nozzle, substantially as described.

8. In an exhaust-steam injector, an exhaust-steam-supply chamber with lateral inlet-passage, an exhaust-steam nozzle in free communication with said chamber, a livesteam valve carried by the end of the injector-casing and having its main exit in communication with said exhaust-steam-supply chamber, a hollow live-steam spindle carried by said valve and extending into said steamnozzle, and a supplementary valve for controlling the supply of live steam to said spindle, substantially as described.

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9. In an injector, an eXhaust-steam-supply chamber with lateral inlet-passage, an end- Wise-movable exhaust-steamvnozzle l in cominunioation With said steam-supply chamber, a Worm-Wheel fast on the exterior of said nozzle, a Worin gearing With said Worm-Wheel and xed on a spindle extending to the exterior of the injector-casing, and a xed spindle extending inward from the end of the inio jeetor-casing and passing centrally through said nozzle, substantially as herein described for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

ROBERT GRUNDY BROOKE.

Witnesses:

EDWIN JONES, W. WARDLE. 

